Two samples of electronic components were tested in two different testing conditions – see results below. The first test at 353K was suspended after 250 hrs.

Estimate the 90% two sided intervals for the MTTF for each of the temperatures.

Also estimate the one sided confidence interval for the MTTF for both 90% and 95% confidence.

Based on the one-sided values, find the reliabilities at 100 hrs for both confidences and temperatures, assuming constant failure rate (4 values).

353(80 degrees C )

55h	FAIL
63h	FAIL
80h	FAIL
209h	FAIL
250h	SUSPENDED

373k (100 degrees C)

13h FAIL 15h FAIL 30h FAIL 41h FAIL 57h FAIL 93h FAIL 109.9h FAIL

Answer rating: 100% (QA)

The twosided 90 confidence interval for the MTTF at 353K is 55 63 The onesided 90 confidence interva... View the full answer